| 摘要 |
The present invention relates to a steam turbine arrangement. The steam turbine arrangement comprises a first steam turbine (110) with a first steam outlet (211), wherein the first steam turbine exhibiting a first sealing leakage,a second steam turbine (120) exhibiting a second sealing leakage, and a third steam turbine (130) with a cooling steam inlet (231), a functional device and a cooling arrangement. The cooing arrangement is coupled to the cooling steam inlet (231), wherein the cooling arrangement is adapted for guiding a cooling steam to the functional device for cooling purposes. A steam pipe (205) is coupled to the first steam turbine (110) and to the second steam turbine (120) such that a first steam being provided by the first sealing leakage and a second steam being provided by the second sealing leakage is gathered to a cooling steam in the steam pipe (205). The steam pipe (205) is coupled to the cooling steam inlet (231) such that the cooling steam is injectable to the cooling arrangement. A first extraction control valve (201) which is coupled between the first steam outlet (211) of the first steam turbine (110) and the steam pipe (205) such that an extraction of a first control steam (m1) from the first steam turbine (110) and an injection of the first control steam (m1) into the steam pipe (205) is controllable by the first extraction control valve (201), so that a desired mass flow (md) of cooling steam in the steam pipe (205) is adjustable for controlling the cooling power capacity of the cooling arrangement. |
